//var %i = 1 | while (%i <= $ulist(*,10,0)) { msg $ulist(*,10,%i) your msg | inc %i }
note that if the user isn't only u will get an error from the server 'no such nick/channel' also if u have many nicknames
with that level u may excess flooded so u could use a timer:
except: msg $ulist(*,10,%i) your msg
use: .timer 1 $calc(%i * N) /msg $ulist(*,10,%i) your msg
replace N with the number of seconds that will be the interval